The launcher displayed the following.

The game crashed whilst rendering entity in world
Error: java.lang.NullPointerException: Cannot invoke "dev.tr7zw.skinlayers.accessor.SkullSettings.getHeadLayers()" because "dev.tr7zw.skinlayers.SkullRendererCache.lastSkull" is null

I will post the crash log.
crash-2024-05-21_04.10.29-client.txt

If this is by Exordium, it will be posted to Exordium.

This has nothing to do with Exordium(added to not even being released for 1.20.6). Seems more like an issue with moreculling of itemframes? Weird, will check to add a workaround for the crash.

After adding Exordium, I started getting crashes when entering some areas. However, if I enter after the crash, it does not crash.